Electric soldering iron



Jan. 25, 1938. J. SCHUBERT ELECTRIC SOLDERING IRON Filed Nov. 4, 1955 frzysfarmer Patented Jan. 2 s, 1938 I 2,l06,439

UNITED STATES oFFlC E ELECTRIC SQLDERING upon Julius Schubert, Long Island City, N. vY., assignor to Steiner Bros. l nc., Long Island City, N. Y., a corporation of New York 1 Application November 4, 1935, Serial No. 48,253

1 Claim. (01. 219- -2c) This invention relates to electric soldering irons in the tip to heat the carbon and transmit heat and, among other objects, aimsto provide a relato the tip. tively simple, rugged, reliable and cheap tool of In this p t e lower m} he conductor this type adapted to be heated "almost instanrod It has a split socket to receive a small exten- 5 taneously, Th main e i t prgvide an 1 sion 29 which is adaptedto be pushed into contact 5 proved simple tool that can be used with a small the upper end of the catboh electrode transformer and connected to anpordinary lamp. tehslohs of different lengths e) be d to socket or source of alternating current at the change the effective l h of therod. usual voltage or to any source of low voltage alter- To Insulate the Conductor rod f om the tube 0 nating or direct current. I ll, there'is shown a porcelain sleeve 2| closely other aims and advantages of the invention in the tube. The upper endpf Sleeve is will appear in the specification, when considered cut away Oh one Side 50 that it Wm Pass the Screw ccom an drawing l2 and provide a stop shoulder 22 to limit its g gsgfifi the a P W g movement into the handle. The lower end of the lain sleeve serves as a stop for the carbon Fig. 1 is a central sectional View of a soldering Dome tool adapted to be used with a Separate trans, electrode l9 so that when the rod is withdrawn a former w supplied with. alternating current at from contact with the electrode, the electrode will the usual voltage. r not follow it into the sleeve. The conductor rod I8 is adapted to be manipuodifi d form of v th too l :934:1 g trl rfs io r nzr mourfized in the lated by a switch 23 having a Stem jecting through an elongated slot 25 in the banhandle die. This button may be made of heat insulating 3 Sectional taken the line material and is preferably connected to a screw of and 26 which binds the terminal of conductor 16 to is a fragmentary sectional View showing the upper end of the rod IS. The rod is normally 25 how the tool in Fig. 2 maybe employed for weld-- urged upwardly out of engagement with the cap mg and hTazihgbon electrode by means of expansion spring 21 Referring pertlculafly to the drawing the y between the upper end of the porcelain sleeve and of tool shown in i 1 is designed to be used wlth the stem 24 of the push-button. Contactlmay be 30 a small step-down transformer when connected to made by Simply pushingon t tt 13 until t 30 a source of alternating current at, S y, 110 Volts, extension 24 strikes the electrode and the contact Or it may e Connected direetly'te an automobile, is broken when the button is released. The tip st a e ba t y pp y y 6 to 12 V This It is shown as having a peep opening 28 through. yp f tool i w l adapted for use in factories. which the carbon electrode may be observed. 0 shops, laboratories, households and on farms for When the current is turned on by making the conall kinds of soldering. tact, the electrode will be heated almost instant- Herein, the tool has a hollow handle l0 conly'and will glow through the peephole. veniently made of wood or other suitable mate- In Fig 2, th i h w a t 11n whi h a all rial. A metal tube I is removab y s cured in t transformer is mounted in the handle. This type 40 lower end o the andle by mea o a c ew 2 of tool is adapted to be used by tinners and plumb- 40 shown as pr jecting through it and to prevent the ers and other artisans who require portable tools tube from burning, the handle, it is insulated of this type. .In this example, the conductor rod therefrom y a Short tubule! piece of heat 1115117 I8 is always held in contact with the carbon elecfl l material h as asbestos and m c trode l9 by a compression spring 30 electrically The lower end of the tube is screw threaded inconnecting one terminal of the transformer with e y receive a hollow soldering tip 14. the rod, the other terminal or the transformerbeln'this instance, tr al ndu s 5 and Hi ing connected to the tube ll bya, conductor 3|. S as leading from the w id 0! a trans- The transformer is so designed as to form a part former ll enter the upper end of the handle it, oi. the tool handle, and the upper end 82 provides one conductor being connected to the upper end a hand grip through which the conductors I! of a slidable metal conductor It in the forr'nofia and I6 project to connect to the high side of'the small rod projecting into the tube H to a point transf0rmer. In this case, the current is connear the lower end; while the other conductor is trolled by an ordinary switch 33in the handle. connected to the tube l l, whereby the circuit may This arrangement permits the handle, which may be completed through a carboneiectrode l8 seated be of any suitable design, and tlfe soldering tool to be attached to the opposite ends of the transformer housing. The tool is shown as being secured to an annular flange 34 on the transformer housing, a hollow extension II being connected to said flange. The hand grip portion or the handle may be secured in like manner to the upper end of the transformer housing.

This type of tool is ready for instant use when connected to alternating essary for the artisan to carry a separate transformer. It may be plugged into any convenient outlet for immediate use.

In Fig. 4, the tool shown in Fig. 2 is slightly modified for welding and brazing. In this instance, the tip II' and the short extension 20' are removed and replaced by a screw bushing 4| and a long extension 4|, respectively. The bushing is made of insulating material and serves to hold the porcelain sleeve II in place. The extension 4| has a split socket 42 to receive a carbon electrode 0. A clip 44 is secured to the tube H and a conductor ll connects it to the ized parts. They are easy to operate and will comply with all requirements of the underwritcircuits. It is not necera. The carbon'electrodes are easyto replace by The welding rod exwith the short conmay be used for braling. The tool is always ready take the place oi practiirons and similar weldremoving the soldering tip. tension is interchangeable for instant use. and will cally all other soldering ing tools.

Obviously, the present invention is not restricted to the particular embodiment thereof herein shown and described. Moreover, it is not indispensable that all of the features of the invention be used coniointly, since they may be employed advantageously in various combinations and sub-combinations.

What is claimed is:

An electric soldering tool oi the character described comprising, in combination, a handle; a step-down transformer associated with the handle; a switch in the transformer circuit; a metal tube connected to one terminal on thelow voltage side of the transformena soldering tip on the metal tube; a carbon electrode in the soldering tip; a conductor mounted in and insulated from the tube; and a combined compression spring and conductor connecting the upper end of the rod to the low voltageside of the transformer to maintain said rod in contact with said electrode.

JULIUS SCHUBERT. 

